Charak Samhita
सप्ताहं वा दशाहं वा पक्षं मासमथापि वा। बलकालविशेषज्ञो भिषक् तक्रं प्रयोजयेत्॥७८॥
The butter-milk should be given for either one week or for ten days or for fifteen days or for a month according to strength of the patient and season.
english translation
saptAhaM vA dazAhaM vA pakSaM mAsamathApi vA। balakAlavizeSajJo bhiSak takraM prayojayet॥78॥
hk transliteration by Sanscript